1 /* Target-vector operations for controlling win32 child processes, for GDB.
3 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
6 Contributed by Cygnus Solutions, A Red Hat Company.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* Originally by Steve Chamberlain, sac@cygnus.com */
26 #include "frame.h" /* required by inferior.h */
29 #include "exceptions.h"
32 #include "completer.h"
36 #include <sys/types.h>
42 #include <sys/cygwin.h>
49 #include "gdb_obstack.h"
50 #include "gdb_string.h"
51 #include "gdbthread.h"
53 #include <sys/param.h>
58 #include "xml-support.h"
60 #include "i386-tdep.h"
61 #include "i387-tdep.h"
63 #include "i386-cygwin-tdep.h"
64 #include "win32-nat.h"
66 static struct target_ops win32_ops;
69 /* The starting and ending address of the cygwin1.dll text segment. */
70 static bfd_vma cygwin_load_start;
71 static bfd_vma cygwin_load_end;
74 static int have_saved_context; /* True if we've saved context from a cygwin signal. */
75 static CONTEXT saved_context; /* Containes the saved context from a cygwin signal. */
77 /* If we're not using the old Cygwin header file set, define the
78 following which never should have been in the generic Win32 API
79 headers in the first place since they were our own invention... */
80 #ifndef _GNU_H_WINDOWS_H
83 FLAG_TRACE_BIT = 0x100,
84 CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT)
89 #ifndef CONTEXT_EXTENDED_REGISTERS
90 /* This macro is only defined on ia32. It only makes sense on this target,
91 so define it as zero if not already defined. */
92 #define CONTEXT_EXTENDED_REGISTERS 0
95 #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \
96 | CONTEXT_EXTENDED_REGISTERS
98 static unsigned dr[8];
99 static int debug_registers_changed;
100 static int debug_registers_used;
101 #define DR6_CLEAR_VALUE 0xffff0ff0
103 /* The string sent by cygwin when it processes a signal.
104 FIXME: This should be in a cygwin include file. */
105 #ifndef _CYGWIN_SIGNAL_STRING
106 #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
109 #define CHECK(x) check (x, __FILE__,__LINE__)
110 #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
111 #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
112 #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
113 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
115 static void win32_stop (ptid_t);
116 static int win32_win32_thread_alive (ptid_t);
117 static void win32_kill_inferior (void);
119 static enum target_signal last_sig = TARGET_SIGNAL_0;
120 /* Set if a signal was received from the debugged process */
122 /* Thread information structure used to track information that is
123 not available in gdb's thread structure. */
124 typedef struct thread_info_struct
126 struct thread_info_struct *next;
137 static thread_info thread_head;
139 /* The process and thread handles for the above context. */
141 static DEBUG_EVENT current_event; /* The current debug event from
143 static HANDLE current_process_handle; /* Currently executing process */
144 static thread_info *current_thread; /* Info on currently selected thread */
145 static DWORD main_thread_id; /* Thread ID of the main thread */
147 /* Counts of things. */
148 static int exception_count = 0;
149 static int event_count = 0;
150 static int saw_create;
151 static int open_process_used = 0;
154 static int new_console = 0;
156 static int cygwin_exceptions = 0;
158 static int new_group = 1;
159 static int debug_exec = 0; /* show execution */
160 static int debug_events = 0; /* show events from kernel */
161 static int debug_memory = 0; /* show target memory accesses */
162 static int debug_exceptions = 0; /* show target exceptions */
163 static int useshell = 0; /* use shell for subprocesses */
165 /* This vector maps GDB's idea of a register's number into an offset
166 in the win32 exception context vector.
168 It also contains the bit mask needed to load the register in question.
170 The contents of this table can only be computed by the units
171 that provide CPU-specific support for Windows native debugging.
172 These units should set the table by calling
173 win32_set_context_register_offsets.
175 One day we could read a reg, we could inspect the context we
176 already have loaded, if it doesn't have the bit set that we need,
177 we read that set of registers in using GetThreadContext. If the
178 context already contains what we need, we just unpack it. Then to
179 write a register, first we have to ensure that the context contains
180 the other regs of the group, and then we copy the info in and set
183 static const int *mappings;
185 /* This vector maps the target's idea of an exception (extracted
186 from the DEBUG_EVENT structure) to GDB's idea. */
188 struct xlate_exception
191 enum target_signal us;
194 static const struct xlate_exception
197 {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV},
198 {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV},
199 {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP},
200 {DBG_CONTROL_C, TARGET_SIGNAL_INT},
201 {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
202 {STATUS_FLOAT_DIVIDE_BY_ZERO, TARGET_SIGNAL_FPE},
205 /* Set the MAPPINGS static global to OFFSETS.
206 See the description of MAPPINGS for more details. */
209 win32_set_context_register_offsets (const int *offsets)
215 check (BOOL ok, const char *file, int line)
218 printf_filtered ("error return %s:%d was %lu\n", file, line,
222 /* Find a thread record given a thread id. If GET_CONTEXT is not 0,
223 then also retrieve the context for this thread. If GET_CONTEXT is
224 negative, then don't suspend the thread. */
226 thread_rec (DWORD id, int get_context)
230 for (th = &thread_head; (th = th->next) != NULL;)
233 if (!th->suspended && get_context)
235 if (get_context > 0 && id != current_event.dwThreadId)
237 if (SuspendThread (th->h) == (DWORD) -1)
239 DWORD err = GetLastError ();
240 warning (_("SuspendThread failed. (winerr %d)"),
246 else if (get_context < 0)
248 th->reload_context = 1;
256 /* Add a thread to the thread list. */
258 win32_add_thread (ptid_t ptid, HANDLE h)
263 gdb_assert (ptid_get_tid (ptid) != 0);
265 id = ptid_get_tid (ptid);
267 if ((th = thread_rec (id, FALSE)))
270 th = XZALLOC (thread_info);
273 th->next = thread_head.next;
274 thread_head.next = th;
276 /* Set the debug registers for the new thread if they are used. */
277 if (debug_registers_used)
279 /* Only change the value of the debug registers. */
280 th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
281 CHECK (GetThreadContext (th->h, &th->context));
282 th->context.Dr0 = dr[0];
283 th->context.Dr1 = dr[1];
284 th->context.Dr2 = dr[2];
285 th->context.Dr3 = dr[3];
286 th->context.Dr6 = DR6_CLEAR_VALUE;
287 th->context.Dr7 = dr[7];
288 CHECK (SetThreadContext (th->h, &th->context));
289 th->context.ContextFlags = 0;
294 /* Clear out any old thread list and reintialize it to a
297 win32_init_thread_list (void)
299 thread_info *th = &thread_head;
301 DEBUG_EVENTS (("gdb: win32_init_thread_list\n"));
303 while (th->next != NULL)
305 thread_info *here = th->next;
306 th->next = here->next;
309 thread_head.next = NULL;
312 /* Delete a thread from the list of threads */
314 win32_delete_thread (ptid_t ptid)
319 gdb_assert (ptid_get_tid (ptid) != 0);
321 id = ptid_get_tid (ptid);
324 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid));
325 delete_thread (ptid);
327 for (th = &thread_head;
328 th->next != NULL && th->next->id != id;
332 if (th->next != NULL)
334 thread_info *here = th->next;
335 th->next = here->next;
341 do_win32_fetch_inferior_registers (struct regcache *regcache, int r)
343 char *context_offset = ((char *) ¤t_thread->context) + mappings[r];
344 struct gdbarch *gdbarch = get_regcache_arch (regcache);
345 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
349 return; /* Windows sometimes uses a non-existent thread id in its
352 if (current_thread->reload_context)
354 #ifdef __COPY_CONTEXT_SIZE
355 if (have_saved_context)
357 /* Lie about where the program actually is stopped since cygwin has informed us that
358 we should consider the signal to have occurred at another location which is stored
359 in "saved_context. */
360 memcpy (¤t_thread->context, &saved_context, __COPY_CONTEXT_SIZE);
361 have_saved_context = 0;
366 thread_info *th = current_thread;
367 th->context.ContextFlags = CONTEXT_DEBUGGER_DR;
368 GetThreadContext (th->h, &th->context);
369 /* Copy dr values from that thread.
370 But only if there were not modified since last stop. PR gdb/2388 */
371 if (!debug_registers_changed)
373 dr[0] = th->context.Dr0;
374 dr[1] = th->context.Dr1;
375 dr[2] = th->context.Dr2;
376 dr[3] = th->context.Dr3;
377 dr[6] = th->context.Dr6;
378 dr[7] = th->context.Dr7;
381 current_thread->reload_context = 0;
384 if (r == I387_FISEG_REGNUM (tdep))
386 l = *((long *) context_offset) & 0xffff;
387 regcache_raw_supply (regcache, r, (char *) &l);
389 else if (r == I387_FOP_REGNUM (tdep))
391 l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
392 regcache_raw_supply (regcache, r, (char *) &l);
395 regcache_raw_supply (regcache, r, context_offset);
398 for (r = 0; r < gdbarch_num_regs (gdbarch); r++)
399 do_win32_fetch_inferior_registers (regcache, r);
404 win32_fetch_inferior_registers (struct regcache *regcache, int r)
406 current_thread = thread_rec (ptid_get_tid (inferior_ptid), TRUE);
407 /* Check if current_thread exists. Windows sometimes uses a non-existent
408 thread id in its events */
410 do_win32_fetch_inferior_registers (regcache, r);
414 do_win32_store_inferior_registers (const struct regcache *regcache, int r)
417 /* Windows sometimes uses a non-existent thread id in its events */;
419 regcache_raw_collect (regcache, r,
420 ((char *) ¤t_thread->context) + mappings[r]);
423 for (r = 0; r < gdbarch_num_regs (get_regcache_arch (regcache)); r++)
424 do_win32_store_inferior_registers (regcache, r);
428 /* Store a new register value into the current thread context */
430 win32_store_inferior_registers (struct regcache *regcache, int r)
432 current_thread = thread_rec (ptid_get_tid (inferior_ptid), TRUE);
433 /* Check if current_thread exists. Windows sometimes uses a non-existent
434 thread id in its events */
436 do_win32_store_inferior_registers (regcache, r);
439 static int psapi_loaded = 0;
440 static BOOL WINAPI (*psapi_EnumProcessModules) (HANDLE, HMODULE *, DWORD,
442 static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO,
444 static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR,
447 /* Get the name of a given module at at given base address. If base_address
448 is zero return the first loaded module (which is always the name of the
451 get_module_name (LPVOID base_address, char *dll_name_ret)
457 HMODULE *DllHandle = dh_buf; /* Set to temporary storage for initial query */
460 char pathbuf[PATH_MAX + 1]; /* Temporary storage prior to converting to
463 char *pathbuf = dll_name_ret; /* Just copy directly to passed-in arg */
466 /* If psapi_loaded < 0 either psapi.dll is not available or it does not contain
467 the needed functions. */
468 if (psapi_loaded <= 0)
472 /* Find size of buffer needed to handle list of modules loaded in inferior */
473 if (!psapi_EnumProcessModules (current_process_handle, DllHandle,
474 sizeof (HMODULE), &cbNeeded) || !cbNeeded)
477 /* Allocate correct amount of space for module list */
478 DllHandle = (HMODULE *) alloca (cbNeeded);
482 /* Get the list of modules */
483 if (!psapi_EnumProcessModules (current_process_handle, DllHandle, cbNeeded,
487 for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++)
489 /* Get information on this module */
490 if (!psapi_GetModuleInformation (current_process_handle, DllHandle[i],
492 error (_("Can't get module info"));
494 if (!base_address || mi.lpBaseOfDll == base_address)
496 /* Try to find the name of the given module */
497 len = psapi_GetModuleFileNameExA (current_process_handle,
498 DllHandle[i], pathbuf, MAX_PATH);
500 error (_("Error getting dll name: %u."), (unsigned) GetLastError ());
502 /* Cygwin prefers that the path be in /x/y/z format */
503 cygwin_conv_to_full_posix_path (pathbuf, dll_name_ret);
505 return 1; /* success */
510 dll_name_ret[0] = '\0';
511 return 0; /* failure */
514 /* Encapsulate the information required in a call to
515 symbol_file_add_args */
516 struct safe_symbol_file_add_args
520 struct section_addr_info *addrs;
523 struct ui_file *err, *out;
527 /* Maintain a linked list of "so" information. */
533 static struct so_list solib_start, *solib_end;
535 /* Call symbol_file_add with stderr redirected. We don't care if there
538 safe_symbol_file_add_stub (void *argv)
540 #define p ((struct safe_symbol_file_add_args *) argv)
541 p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags);
546 /* Restore gdb's stderr after calling symbol_file_add */
548 safe_symbol_file_add_cleanup (void *p)
550 #define sp ((struct safe_symbol_file_add_args *)p)
551 gdb_flush (gdb_stderr);
552 gdb_flush (gdb_stdout);
553 ui_file_delete (gdb_stderr);
554 ui_file_delete (gdb_stdout);
555 gdb_stderr = sp->err;
556 gdb_stdout = sp->out;
560 /* symbol_file_add wrapper that prevents errors from being displayed. */
561 static struct objfile *
562 safe_symbol_file_add (char *name, int from_tty,
563 struct section_addr_info *addrs,
564 int mainline, int flags)
566 struct safe_symbol_file_add_args p;
567 struct cleanup *cleanup;
569 cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p);
573 gdb_flush (gdb_stderr);
574 gdb_flush (gdb_stdout);
575 gdb_stderr = ui_file_new ();
576 gdb_stdout = ui_file_new ();
578 p.from_tty = from_tty;
580 p.mainline = mainline;
582 catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR);
584 do_cleanups (cleanup);
588 static struct so_list *
589 win32_make_so (const char *name, LPVOID load_addr)
592 char buf[MAX_PATH + 1];
593 char cwd[MAX_PATH + 1];
595 WIN32_FIND_DATA w32_fd;
596 HANDLE h = FindFirstFile(name, &w32_fd);
597 MEMORY_BASIC_INFORMATION m;
599 if (h == INVALID_HANDLE_VALUE)
605 if (GetCurrentDirectory (MAX_PATH + 1, cwd))
607 p = strrchr (buf, '\\');
610 SetCurrentDirectory (buf);
611 GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p);
612 SetCurrentDirectory (cwd);
616 if (strcasecmp (buf, "ntdll.dll") == 0)
618 GetSystemDirectory (buf, sizeof (buf));
619 strcat (buf, "\\ntdll.dll");
621 so = XZALLOC (struct so_list);
622 so->lm_info = (struct lm_info *) xmalloc (sizeof (struct lm_info));
623 so->lm_info->load_addr = load_addr;
624 strcpy (so->so_original_name, name);
626 strcpy (so->so_name, buf);
628 cygwin_conv_to_posix_path (buf, so->so_name);
629 /* Record cygwin1.dll .text start/end. */
630 p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1);
631 if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0)
634 asection *text = NULL;
637 abfd = bfd_openr (so->so_name, "pei-i386");
642 if (bfd_check_format (abfd, bfd_object))
643 text = bfd_get_section_by_name (abfd, ".text");
651 /* The symbols in a dll are offset by 0x1000, which is the the
652 offset from 0 of the first byte in an image - because of the
653 file header and the section alignment. */
654 cygwin_load_start = load_addr + 0x1000;
655 cygwin_load_end = cygwin_load_start + bfd_section_size (abfd, text);
665 get_image_name (HANDLE h, void *address, int unicode)
667 static char buf[(2 * MAX_PATH) + 1];
668 DWORD size = unicode ? sizeof (WCHAR) : sizeof (char);
674 /* Attempt to read the name of the dll that was detected.
675 This is documented to work only when actively debugging
676 a program. It will not work for attached processes. */
680 /* See if we could read the address of a string, and that the
681 address isn't null. */
682 if (!ReadProcessMemory (h, address, &address_ptr, sizeof (address_ptr), &done)
683 || done != sizeof (address_ptr) || !address_ptr)
686 /* Find the length of the string */
687 while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done)
688 && (b[0] != 0 || b[size - 1] != 0) && done == size)
692 ReadProcessMemory (h, address_ptr, buf, len, &done);
695 WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR));
696 ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR),
699 WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, len, 0, 0);
705 /* Wait for child to do something. Return pid of child, or -1 in case
706 of error; store status through argument pointer OURSTATUS. */
708 handle_load_dll (void *dummy)
710 LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll;
711 char dll_buf[MAX_PATH + 1];
712 char *dll_name = NULL;
714 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
716 if (!get_module_name (event->lpBaseOfDll, dll_buf))
717 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
721 if (*dll_name == '\0')
722 dll_name = get_image_name (current_process_handle,
723 event->lpImageName, event->fUnicode);
727 solib_end->next = win32_make_so (dll_name, event->lpBaseOfDll);
728 solib_end = solib_end->next;
730 DEBUG_EVENTS (("gdb: Loading dll \"%s\" at 0x%lx.\n", solib_end->so_name,
731 solib_end->lm_info->load_addr));
737 win32_free_so (struct so_list *so)
745 handle_unload_dll (void *dummy)
747 LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll;
750 for (so = &solib_start; so->next != NULL; so = so->next)
751 if (so->next->lm_info->load_addr == lpBaseOfDll)
753 struct so_list *sodel = so->next;
754 so->next = sodel->next;
757 DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name));
759 win32_free_so (sodel);
760 solib_add (NULL, 0, NULL, auto_solib_add);
764 error (_("Error: dll starting at 0x%lx not found."), (DWORD) lpBaseOfDll);
769 /* Clear list of loaded DLLs. */
771 win32_clear_solib (void)
773 solib_start.next = NULL;
774 solib_end = &solib_start;
777 /* Load DLL symbol info. */
779 dll_symbol_command (char *args, int from_tty)
785 error (_("dll-symbols requires a file name"));
788 if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0)
790 char *newargs = (char *) alloca (n + 4 + 1);
791 strcpy (newargs, args);
792 strcat (newargs, ".dll");
796 safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED);
799 /* Handle DEBUG_STRING output from child process.
800 Cygwin prepends its messages with a "cygwin:". Interpret this as
801 a Cygwin signal. Otherwise just print the string as a warning. */
803 handle_output_debug_string (struct target_waitstatus *ourstatus)
808 if (!target_read_string
809 ((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData,
813 else if (strncmp (s, _CYGWIN_SIGNAL_STRING, sizeof (_CYGWIN_SIGNAL_STRING) - 1) != 0)
816 if (strncmp (s, "cYg", 3) != 0)
820 #ifdef __COPY_CONTEXT_SIZE
823 /* Got a cygwin signal marker. A cygwin signal is followed by the signal number
824 itself and then optionally followed by the thread id and address to saved context
825 within the DLL. If these are supplied, then the given thread is assumed to have
826 issued the signal and the context from the thread is assumed to be stored at the
827 given address in the inferior. Tell gdb to treat this like a real signal. */
829 int sig = strtol (s + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0);
830 int gotasig = target_signal_from_host (sig);
831 ourstatus->value.sig = gotasig;
836 ourstatus->kind = TARGET_WAITKIND_STOPPED;
837 retval = strtoul (p, &p, 0);
839 retval = main_thread_id;
840 else if ((x = (LPCVOID) strtoul (p, &p, 0))
841 && ReadProcessMemory (current_process_handle, x,
842 &saved_context, __COPY_CONTEXT_SIZE, &n)
843 && n == __COPY_CONTEXT_SIZE)
844 have_saved_context = 1;
845 current_event.dwThreadId = retval;
856 display_selector (HANDLE thread, DWORD sel)
859 if (GetThreadSelectorEntry (thread, sel, &info))
862 printf_filtered ("0x%03lx: ", sel);
863 if (!info.HighWord.Bits.Pres)
865 puts_filtered ("Segment not present\n");
868 base = (info.HighWord.Bits.BaseHi << 24) +
869 (info.HighWord.Bits.BaseMid << 16)
871 limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow;
872 if (info.HighWord.Bits.Granularity)
873 limit = (limit << 12) | 0xfff;
874 printf_filtered ("base=0x%08x limit=0x%08x", base, limit);
875 if (info.HighWord.Bits.Default_Big)
876 puts_filtered(" 32-bit ");
878 puts_filtered(" 16-bit ");
879 switch ((info.HighWord.Bits.Type & 0xf) >> 1)
882 puts_filtered ("Data (Read-Only, Exp-up");
885 puts_filtered ("Data (Read/Write, Exp-up");
888 puts_filtered ("Unused segment (");
891 puts_filtered ("Data (Read/Write, Exp-down");
894 puts_filtered ("Code (Exec-Only, N.Conf");
897 puts_filtered ("Code (Exec/Read, N.Conf");
900 puts_filtered ("Code (Exec-Only, Conf");
903 puts_filtered ("Code (Exec/Read, Conf");
906 printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type);
908 if ((info.HighWord.Bits.Type & 0x1) == 0)
909 puts_filtered(", N.Acc");
910 puts_filtered (")\n");
911 if ((info.HighWord.Bits.Type & 0x10) == 0)
912 puts_filtered("System selector ");
913 printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl);
914 if (info.HighWord.Bits.Granularity)
915 puts_filtered ("Page granular.\n");
917 puts_filtered ("Byte granular.\n");
922 printf_filtered ("Invalid selector 0x%lx.\n",sel);
928 display_selectors (char * args, int from_tty)
932 puts_filtered ("Impossible to display selectors now.\n");
938 puts_filtered ("Selector $cs\n");
939 display_selector (current_thread->h,
940 current_thread->context.SegCs);
941 puts_filtered ("Selector $ds\n");
942 display_selector (current_thread->h,
943 current_thread->context.SegDs);
944 puts_filtered ("Selector $es\n");
945 display_selector (current_thread->h,
946 current_thread->context.SegEs);
947 puts_filtered ("Selector $ss\n");
948 display_selector (current_thread->h,
949 current_thread->context.SegSs);
950 puts_filtered ("Selector $fs\n");
951 display_selector (current_thread->h,
952 current_thread->context.SegFs);
953 puts_filtered ("Selector $gs\n");
954 display_selector (current_thread->h,
955 current_thread->context.SegGs);
960 sel = parse_and_eval_long (args);
961 printf_filtered ("Selector \"%s\"\n",args);
962 display_selector (current_thread->h, sel);
966 static struct cmd_list_element *info_w32_cmdlist = NULL;
969 info_w32_command (char *args, int from_tty)
971 help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout);
975 #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
976 printf_unfiltered ("gdb: Target exception %s at 0x%08lx\n", x, \
977 current_event.u.Exception.ExceptionRecord.ExceptionAddress)
980 handle_exception (struct target_waitstatus *ourstatus)
983 DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode;
985 ourstatus->kind = TARGET_WAITKIND_STOPPED;
987 /* Record the context of the current thread */
988 th = thread_rec (current_event.dwThreadId, -1);
992 case EXCEPTION_ACCESS_VIOLATION:
993 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
994 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
997 /* See if the access violation happened within the cygwin DLL itself. Cygwin uses
998 a kind of exception handling to deal with passed-in invalid addresses. gdb
999 should not treat these as real SEGVs since they will be silently handled by
1000 cygwin. A real SEGV will (theoretically) be caught by cygwin later in the process
1001 and will be sent as a cygwin-specific-signal. So, ignore SEGVs if they show up
1002 within the text segment of the DLL itself. */
1004 bfd_vma addr = (bfd_vma) (uintptr_t) current_event.u.Exception.
1005 ExceptionRecord.ExceptionAddress;
1006 if ((!cygwin_exceptions && (addr >= cygwin_load_start && addr < cygwin_load_end))
1007 || (find_pc_partial_function (addr, &fn, NULL, NULL)
1008 && strncmp (fn, "KERNEL32!IsBad", strlen ("KERNEL32!IsBad")) == 0))
1013 case STATUS_STACK_OVERFLOW:
1014 DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
1015 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
1017 case STATUS_FLOAT_DENORMAL_OPERAND:
1018 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
1019 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1021 case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
1022 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
1023 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1025 case STATUS_FLOAT_INEXACT_RESULT:
1026 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
1027 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1029 case STATUS_FLOAT_INVALID_OPERATION:
1030 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
1031 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1033 case STATUS_FLOAT_OVERFLOW:
1034 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
1035 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1037 case STATUS_FLOAT_STACK_CHECK:
1038 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
1039 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1041 case STATUS_FLOAT_UNDERFLOW:
1042 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
1043 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1045 case STATUS_FLOAT_DIVIDE_BY_ZERO:
1046 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
1047 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1049 case STATUS_INTEGER_DIVIDE_BY_ZERO:
1050 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
1051 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1053 case STATUS_INTEGER_OVERFLOW:
1054 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
1055 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1057 case EXCEPTION_BREAKPOINT:
1058 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
1059 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
1062 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
1063 ourstatus->value.sig = TARGET_SIGNAL_INT;
1065 case DBG_CONTROL_BREAK:
1066 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
1067 ourstatus->value.sig = TARGET_SIGNAL_INT;
1069 case EXCEPTION_SINGLE_STEP:
1070 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
1071 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
1073 case EXCEPTION_ILLEGAL_INSTRUCTION:
1074 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
1075 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1077 case EXCEPTION_PRIV_INSTRUCTION:
1078 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
1079 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1081 case EXCEPTION_NONCONTINUABLE_EXCEPTION:
1082 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
1083 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1086 /* Treat unhandled first chance exceptions specially. */
1087 if (current_event.u.Exception.dwFirstChance)
1089 printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n",
1090 current_event.u.Exception.ExceptionRecord.ExceptionCode,
1091 current_event.u.Exception.ExceptionRecord.ExceptionAddress);
1092 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
1096 last_sig = ourstatus->value.sig;
1100 /* Resume all artificially suspended threads if we are continuing
1103 win32_continue (DWORD continue_status, int id)
1109 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n",
1110 current_event.dwProcessId, current_event.dwThreadId,
1111 continue_status == DBG_CONTINUE ?
1112 "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
1114 for (th = &thread_head; (th = th->next) != NULL;)
1115 if ((id == -1 || id == (int) th->id)
1118 if (debug_registers_changed)
1120 th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1121 th->context.Dr0 = dr[0];
1122 th->context.Dr1 = dr[1];
1123 th->context.Dr2 = dr[2];
1124 th->context.Dr3 = dr[3];
1125 th->context.Dr6 = DR6_CLEAR_VALUE;
1126 th->context.Dr7 = dr[7];
1128 if (th->context.ContextFlags)
1130 CHECK (SetThreadContext (th->h, &th->context));
1131 th->context.ContextFlags = 0;
1133 if (th->suspended > 0)
1134 (void) ResumeThread (th->h);
1138 res = ContinueDebugEvent (current_event.dwProcessId,
1139 current_event.dwThreadId,
1142 debug_registers_changed = 0;
1146 /* Called in pathological case where Windows fails to send a
1147 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1149 fake_create_process (void)
1151 current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE,
1152 current_event.dwProcessId);
1153 if (current_process_handle != NULL)
1154 open_process_used = 1;
1157 error (_("OpenProcess call failed, GetLastError = %lud\n"),
1159 /* We can not debug anything in that case. */
1161 main_thread_id = current_event.dwThreadId;
1162 current_thread = win32_add_thread (ptid_build (current_event.dwProcessId, 0,
1163 current_event.dwThreadId),
1164 current_event.u.CreateThread.hThread);
1165 return main_thread_id;
1169 win32_resume (ptid_t ptid, int step, enum target_signal sig)
1172 DWORD continue_status = DBG_CONTINUE;
1174 /* A specific PTID means `step only this thread id'. */
1175 int resume_all = ptid_equal (ptid, minus_one_ptid);
1177 /* If we're continuing all threads, it's the current inferior that
1178 should be handled specially. */
1180 ptid = inferior_ptid;
1182 if (sig != TARGET_SIGNAL_0)
1184 if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT)
1186 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig));
1188 else if (sig == last_sig)
1189 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1192 /* This code does not seem to work, because
1193 the kernel does probably not consider changes in the ExceptionRecord
1194 structure when passing the exception to the inferior.
1195 Note that this seems possible in the exception handler itself. */
1198 for (i = 0; xlate[i].them != -1; i++)
1199 if (xlate[i].us == sig)
1201 current_event.u.Exception.ExceptionRecord.ExceptionCode =
1203 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1206 if (continue_status == DBG_CONTINUE)
1208 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig));
1212 DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n",
1216 last_sig = TARGET_SIGNAL_0;
1218 DEBUG_EXEC (("gdb: win32_resume (pid=%d, tid=%ld, step=%d, sig=%d);\n",
1219 ptid_get_pid (ptid), ptid_get_tid (ptid), step, sig));
1221 /* Get context for currently selected thread */
1222 th = thread_rec (ptid_get_tid (inferior_ptid), FALSE);
1227 /* Single step by setting t bit */
1228 win32_fetch_inferior_registers (get_current_regcache (),
1229 gdbarch_ps_regnum (current_gdbarch));
1230 th->context.EFlags |= FLAG_TRACE_BIT;
1233 if (th->context.ContextFlags)
1235 if (debug_registers_changed)
1237 th->context.Dr0 = dr[0];
1238 th->context.Dr1 = dr[1];
1239 th->context.Dr2 = dr[2];
1240 th->context.Dr3 = dr[3];
1241 th->context.Dr6 = DR6_CLEAR_VALUE;
1242 th->context.Dr7 = dr[7];
1244 CHECK (SetThreadContext (th->h, &th->context));
1245 th->context.ContextFlags = 0;
1249 /* Allow continuing with the same signal that interrupted us.
1250 Otherwise complain. */
1253 win32_continue (continue_status, -1);
1255 win32_continue (continue_status, ptid_get_tid (ptid));
1258 /* Get the next event from the child. Return 1 if the event requires
1259 handling by WFI (or whatever).
1262 get_win32_debug_event (int pid, struct target_waitstatus *ourstatus)
1265 DWORD continue_status, event_code;
1267 static thread_info dummy_thread_info;
1270 last_sig = TARGET_SIGNAL_0;
1272 if (!(debug_event = WaitForDebugEvent (¤t_event, 1000)))
1276 continue_status = DBG_CONTINUE;
1278 event_code = current_event.dwDebugEventCode;
1279 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
1281 have_saved_context = 0;
1285 case CREATE_THREAD_DEBUG_EVENT:
1286 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
1287 (unsigned) current_event.dwProcessId,
1288 (unsigned) current_event.dwThreadId,
1289 "CREATE_THREAD_DEBUG_EVENT"));
1290 if (saw_create != 1)
1292 struct inferior *inf;
1293 inf = find_inferior_pid (current_event.dwProcessId);
1294 if (!saw_create && inf->attach_flag)
1296 /* Kludge around a Windows bug where first event is a create
1297 thread event. Caused when attached process does not have
1299 retval = fake_create_process ();
1305 /* Record the existence of this thread */
1306 retval = current_event.dwThreadId;
1307 th = win32_add_thread (ptid_build (current_event.dwProcessId, 0,
1308 current_event.dwThreadId),
1309 current_event.u.CreateThread.hThread);
1312 case EXIT_THREAD_DEBUG_EVENT:
1313 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1314 (unsigned) current_event.dwProcessId,
1315 (unsigned) current_event.dwThreadId,
1316 "EXIT_THREAD_DEBUG_EVENT"));
1317 if (current_event.dwThreadId != main_thread_id)
1319 win32_delete_thread (ptid_build (current_event.dwProcessId, 0,
1320 current_event.dwThreadId));
1321 th = &dummy_thread_info;
1325 case CREATE_PROCESS_DEBUG_EVENT:
1326 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1327 (unsigned) current_event.dwProcessId,
1328 (unsigned) current_event.dwThreadId,
1329 "CREATE_PROCESS_DEBUG_EVENT"));
1330 CloseHandle (current_event.u.CreateProcessInfo.hFile);
1331 if (++saw_create != 1)
1334 current_process_handle = current_event.u.CreateProcessInfo.hProcess;
1336 win32_delete_thread (ptid_build (current_event.dwProcessId, 0,
1338 main_thread_id = current_event.dwThreadId;
1339 /* Add the main thread */
1340 th = win32_add_thread (ptid_build (current_event.dwProcessId, 0,
1341 current_event.dwThreadId),
1342 current_event.u.CreateProcessInfo.hThread);
1343 retval = current_event.dwThreadId;
1346 case EXIT_PROCESS_DEBUG_EVENT:
1347 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1348 (unsigned) current_event.dwProcessId,
1349 (unsigned) current_event.dwThreadId,
1350 "EXIT_PROCESS_DEBUG_EVENT"));
1351 if (saw_create != 1)
1353 ourstatus->kind = TARGET_WAITKIND_EXITED;
1354 ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
1355 retval = main_thread_id;
1358 case LOAD_DLL_DEBUG_EVENT:
1359 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1360 (unsigned) current_event.dwProcessId,
1361 (unsigned) current_event.dwThreadId,
1362 "LOAD_DLL_DEBUG_EVENT"));
1363 CloseHandle (current_event.u.LoadDll.hFile);
1364 if (saw_create != 1)
1366 catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL);
1367 ourstatus->kind = TARGET_WAITKIND_LOADED;
1368 ourstatus->value.integer = 0;
1369 retval = main_thread_id;
1372 case UNLOAD_DLL_DEBUG_EVENT:
1373 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1374 (unsigned) current_event.dwProcessId,
1375 (unsigned) current_event.dwThreadId,
1376 "UNLOAD_DLL_DEBUG_EVENT"));
1377 if (saw_create != 1)
1379 catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL);
1380 ourstatus->kind = TARGET_WAITKIND_LOADED;
1381 ourstatus->value.integer = 0;
1382 retval = main_thread_id;
1385 case EXCEPTION_DEBUG_EVENT:
1386 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1387 (unsigned) current_event.dwProcessId,
1388 (unsigned) current_event.dwThreadId,
1389 "EXCEPTION_DEBUG_EVENT"));
1390 if (saw_create != 1)
1392 switch (handle_exception (ourstatus))
1395 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1398 retval = current_event.dwThreadId;
1402 continue_status = -1;
1407 case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */
1408 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1409 (unsigned) current_event.dwProcessId,
1410 (unsigned) current_event.dwThreadId,
1411 "OUTPUT_DEBUG_STRING_EVENT"));
1412 if (saw_create != 1)
1414 retval = handle_output_debug_string (ourstatus);
1418 if (saw_create != 1)
1420 printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n",
1421 (DWORD) current_event.dwProcessId,
1422 (DWORD) current_event.dwThreadId);
1423 printf_unfiltered (" unknown event code %ld\n",
1424 current_event.dwDebugEventCode);
1428 if (!retval || saw_create != 1)
1430 if (continue_status == -1)
1431 win32_resume (minus_one_ptid, 0, 1);
1433 CHECK (win32_continue (continue_status, -1));
1437 inferior_ptid = ptid_build (current_event.dwProcessId, 0,
1439 current_thread = th ?: thread_rec (current_event.dwThreadId, TRUE);
1446 /* Wait for interesting events to occur in the target process. */
1448 win32_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
1452 target_terminal_ours ();
1454 /* We loop when we get a non-standard exception rather than return
1455 with a SPURIOUS because resume can try and step or modify things,
1456 which needs a current_thread->h. But some of these exceptions mark
1457 the birth or death of threads, which mean that the current thread
1458 isn't necessarily what you think it is. */
1464 /* Ignore CTRL+C signals while waiting for a debug event.
1465 FIXME: brobecker/2008-05-20: When the user presses CTRL+C while
1466 the inferior is running, both the inferior and GDB receive the
1467 associated signal. If the inferior receives the signal first
1468 and the delay until GDB receives that signal is sufficiently long,
1469 GDB can sometimes receive the SIGINT after we have unblocked
1470 the CTRL+C handler. This would lead to the debugger to stop
1471 prematurely while handling the new-thread event that comes
1472 with the handling of the SIGINT inside the inferior, and then
1473 stop again immediately when the user tries to resume the execution
1474 in the inferior. This is a classic race, and it would be nice
1475 to find a better solution to that problem. But in the meantime,
1476 the current approach already greatly mitigate this issue. */
1477 SetConsoleCtrlHandler (NULL, TRUE);
1478 retval = get_win32_debug_event (pid, ourstatus);
1479 SetConsoleCtrlHandler (NULL, FALSE);
1482 return ptid_build (current_event.dwProcessId, 0, retval);
1487 if (deprecated_ui_loop_hook != NULL)
1488 detach = deprecated_ui_loop_hook (0);
1491 win32_kill_inferior ();
1497 do_initial_win32_stuff (struct target_ops *ops, DWORD pid, int attaching)
1499 extern int stop_after_trap;
1501 struct inferior *inf;
1502 struct thread_info *tp;
1504 last_sig = TARGET_SIGNAL_0;
1506 exception_count = 0;
1507 open_process_used = 0;
1508 debug_registers_changed = 0;
1509 debug_registers_used = 0;
1510 for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
1513 cygwin_load_start = cygwin_load_end = 0;
1515 current_event.dwProcessId = pid;
1516 memset (¤t_event, 0, sizeof (current_event));
1518 disable_breakpoints_in_shlibs ();
1519 win32_clear_solib ();
1520 clear_proceed_status ();
1521 init_wait_for_inferior ();
1523 inf = add_inferior (pid);
1524 inf->attach_flag = attaching;
1526 /* Make the new process the current inferior, so terminal handling
1527 can rely on it. When attaching, we don't know about any thread
1528 id here, but that's OK --- nothing should be referencing the
1529 current thread until we report an event out of win32_wait. */
1530 inferior_ptid = pid_to_ptid (pid);
1532 terminal_init_inferior_with_pgrp (pid);
1533 target_terminal_inferior ();
1535 inf->stop_soon = STOP_QUIETLY;
1538 stop_after_trap = 1;
1539 wait_for_inferior (0);
1540 tp = inferior_thread ();
1541 if (tp->stop_signal != TARGET_SIGNAL_TRAP)
1542 resume (0, tp->stop_signal);
1547 inf->stop_soon = NO_STOP_QUIETLY;
1548 stop_after_trap = 0;
1552 /* Since Windows XP, detaching from a process is supported by Windows.
1553 The following code tries loading the appropriate functions dynamically.
1554 If loading these functions succeeds use them to actually detach from
1555 the inferior process, otherwise behave as usual, pretending that
1556 detach has worked. */
1557 static BOOL WINAPI (*kernel32_DebugSetProcessKillOnExit)(BOOL);
1558 static BOOL WINAPI (*kernel32_DebugActiveProcessStop)(DWORD);
1561 has_detach_ability (void)
1563 static HMODULE kernel32 = NULL;
1566 kernel32 = LoadLibrary ("kernel32.dll");
1569 if (!kernel32_DebugSetProcessKillOnExit)
1570 kernel32_DebugSetProcessKillOnExit =
1571 (void *) GetProcAddress (kernel32, "DebugSetProcessKillOnExit");
1572 if (!kernel32_DebugActiveProcessStop)
1573 kernel32_DebugActiveProcessStop =
1574 (void *) GetProcAddress (kernel32, "DebugActiveProcessStop");
1575 if (kernel32_DebugSetProcessKillOnExit
1576 && kernel32_DebugActiveProcessStop)
1582 /* Try to set or remove a user privilege to the current process. Return -1
1583 if that fails, the previous setting of that privilege otherwise.
1585 This code is copied from the Cygwin source code and rearranged to allow
1586 dynamically loading of the needed symbols from advapi32 which is only
1587 available on NT/2K/XP. */
1589 set_process_privilege (const char *privilege, BOOL enable)
1591 static HMODULE advapi32 = NULL;
1592 static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE);
1593 static BOOL WINAPI (*LookupPrivilegeValue)(LPCSTR, LPCSTR, PLUID);
1594 static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES,
1595 DWORD, PTOKEN_PRIVILEGES, PDWORD);
1597 HANDLE token_hdl = NULL;
1599 TOKEN_PRIVILEGES new_priv, orig_priv;
1603 if (GetVersion () >= 0x80000000) /* No security availbale on 9x/Me */
1608 if (!(advapi32 = LoadLibrary ("advapi32.dll")))
1610 if (!OpenProcessToken)
1612 (void *) GetProcAddress (advapi32, "OpenProcessToken");
1613 if (!LookupPrivilegeValue)
1614 LookupPrivilegeValue =
1615 (void *) GetProcAddress (advapi32, "LookupPrivilegeValueA");
1616 if (!AdjustTokenPrivileges)
1617 AdjustTokenPrivileges =
1618 (void *) GetProcAddress (advapi32, "AdjustTokenPrivileges");
1619 if (!OpenProcessToken || !LookupPrivilegeValue || !AdjustTokenPrivileges)
1626 if (!OpenProcessToken (GetCurrentProcess (),
1627 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
1631 if (!LookupPrivilegeValue (NULL, privilege, &restore_priv))
1634 new_priv.PrivilegeCount = 1;
1635 new_priv.Privileges[0].Luid = restore_priv;
1636 new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
1638 if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
1639 sizeof orig_priv, &orig_priv, &size))
1642 /* Disabled, otherwise every `attach' in an unprivileged user session
1643 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
1645 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
1646 be enabled. GetLastError () returns an correct error code, though. */
1647 if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
1651 ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
1655 CloseHandle (token_hdl);
1660 /* Attach to process PID, then initialize for debugging it. */
1662 win32_attach (struct target_ops *ops, char *args, int from_tty)
1668 error_no_arg (_("process-id to attach"));
1670 if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
1672 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
1673 printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n");
1676 pid = strtoul (args, 0, 0); /* Windows pid */
1678 win32_init_thread_list ();
1679 ok = DebugActiveProcess (pid);
1685 /* Try fall back to Cygwin pid */
1686 pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
1689 ok = DebugActiveProcess (pid);
1694 error (_("Can't attach to process."));
1696 if (has_detach_ability ())
1697 kernel32_DebugSetProcessKillOnExit (FALSE);
1701 char *exec_file = (char *) get_exec_file (0);
1704 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
1705 target_pid_to_str (pid_to_ptid (pid)));
1707 printf_unfiltered ("Attaching to %s\n",
1708 target_pid_to_str (pid_to_ptid (pid)));
1710 gdb_flush (gdb_stdout);
1713 do_initial_win32_stuff (ops, pid, 1);
1714 target_terminal_ours ();
1718 win32_detach (struct target_ops *ops, char *args, int from_tty)
1722 if (has_detach_ability ())
1725 win32_resume (ptid, 0, TARGET_SIGNAL_0);
1727 if (!kernel32_DebugActiveProcessStop (current_event.dwProcessId))
1729 error (_("Can't detach process %lu (error %lu)"),
1730 current_event.dwProcessId, GetLastError ());
1733 kernel32_DebugSetProcessKillOnExit (FALSE);
1735 if (detached && from_tty)
1737 char *exec_file = get_exec_file (0);
1740 printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file,
1741 current_event.dwProcessId);
1742 gdb_flush (gdb_stdout);
1745 inferior_ptid = null_ptid;
1746 detach_inferior (current_event.dwProcessId);
1748 unpush_target (ops);
1752 win32_pid_to_exec_file (int pid)
1754 static char path[MAX_PATH + 1];
1757 /* Try to find exe name as symlink target of /proc/<pid>/exe */
1759 char procexe[sizeof ("/proc/4294967295/exe")];
1760 sprintf (procexe, "/proc/%u/exe", pid);
1761 nchars = readlink (procexe, path, sizeof(path));
1762 if (nchars > 0 && nchars < sizeof (path))
1764 path[nchars] = '\0'; /* Got it */
1769 /* If we get here then either Cygwin is hosed, this isn't a Cygwin version
1770 of gdb, or we're trying to debug a non-Cygwin windows executable. */
1771 if (!get_module_name (0, path))
1777 /* Print status information about what we're accessing. */
1780 win32_files_info (struct target_ops *ignore)
1782 struct inferior *inf = current_inferior ();
1784 printf_unfiltered ("\tUsing the running image of %s %s.\n",
1785 inf->attach_flag ? "attached" : "child",
1786 target_pid_to_str (inferior_ptid));
1790 win32_open (char *arg, int from_tty)
1792 error (_("Use the \"run\" command to start a Unix child process."));
1795 /* Start an inferior win32 child process and sets inferior_ptid to its pid.
1796 EXEC_FILE is the file to run.
1797 ALLARGS is a string containing the arguments to the program.
1798 ENV is the environment vector to pass. Errors reported with error(). */
1801 win32_create_inferior (struct target_ops *ops, char *exec_file,
1802 char *allargs, char **in_env, int from_tty)
1805 PROCESS_INFORMATION pi;
1809 char real_path[MAXPATHLEN];
1811 char shell[MAX_PATH + 1]; /* Path to shell */
1814 int ostdin, ostdout, ostderr;
1815 const char *inferior_io_terminal = get_inferior_io_terminal ();
1818 error (_("No executable specified, use `target exec'."));
1820 memset (&si, 0, sizeof (si));
1821 si.cb = sizeof (si);
1826 flags = DEBUG_ONLY_THIS_PROCESS;
1827 cygwin_conv_to_win32_path (exec_file, real_path);
1833 sh = getenv ("SHELL");
1836 cygwin_conv_to_win32_path (sh, shell);
1837 newallargs = alloca (sizeof (" -c 'exec '") + strlen (exec_file)
1838 + strlen (allargs) + 2);
1839 sprintf (newallargs, " -c 'exec %s %s'", exec_file, allargs);
1840 allargs = newallargs;
1842 flags = DEBUG_PROCESS;
1846 flags = DEBUG_ONLY_THIS_PROCESS;
1850 flags |= CREATE_NEW_PROCESS_GROUP;
1853 flags |= CREATE_NEW_CONSOLE;
1855 args = alloca (strlen (toexec) + strlen (allargs) + 2);
1856 strcpy (args, toexec);
1858 strcat (args, allargs);
1861 /* Prepare the environment vars for CreateProcess. */
1862 cygwin_internal (CW_SYNC_WINENV);
1864 if (!inferior_io_terminal)
1865 tty = ostdin = ostdout = ostderr = -1;
1868 tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY);
1871 print_sys_errmsg (inferior_io_terminal, errno);
1872 ostdin = ostdout = ostderr = -1;
1886 win32_init_thread_list ();
1887 ret = CreateProcess (0,
1888 args, /* command line */
1889 NULL, /* Security */
1891 TRUE, /* inherit handles */
1892 flags, /* start flags */
1893 NULL, /* environment */
1894 NULL, /* current directory */
1912 error (_("Error creating process %s, (error %d)."),
1913 exec_file, (unsigned) GetLastError ());
1915 CloseHandle (pi.hThread);
1916 CloseHandle (pi.hProcess);
1918 if (useshell && shell[0] != '\0')
1923 do_initial_win32_stuff (ops, pi.dwProcessId, 0);
1925 /* win32_continue (DBG_CONTINUE, -1); */
1929 win32_mourn_inferior (struct target_ops *ops)
1931 (void) win32_continue (DBG_CONTINUE, -1);
1932 i386_cleanup_dregs();
1933 if (open_process_used)
1935 CHECK (CloseHandle (current_process_handle));
1936 open_process_used = 0;
1938 unpush_target (ops);
1939 generic_mourn_inferior ();
1942 /* Send a SIGINT to the process group. This acts just like the user typed a
1943 ^C on the controlling terminal. */
1946 win32_stop (ptid_t ptid)
1948 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
1949 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
1950 registers_changed (); /* refresh register state */
1954 win32_xfer_memory (CORE_ADDR memaddr, gdb_byte *our, int len,
1955 int write, struct mem_attrib *mem,
1956 struct target_ops *target)
1961 DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n",
1962 len, (DWORD) (uintptr_t) memaddr));
1963 if (!WriteProcessMemory (current_process_handle,
1964 (LPVOID) (uintptr_t) memaddr, our,
1967 FlushInstructionCache (current_process_handle,
1968 (LPCVOID) (uintptr_t) memaddr, len);
1972 DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n",
1973 len, (DWORD) (uintptr_t) memaddr));
1974 if (!ReadProcessMemory (current_process_handle,
1975 (LPCVOID) (uintptr_t) memaddr, our,
1983 win32_kill_inferior (void)
1985 CHECK (TerminateProcess (current_process_handle, 0));
1989 if (!win32_continue (DBG_CONTINUE, -1))
1991 if (!WaitForDebugEvent (¤t_event, INFINITE))
1993 if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
1997 target_mourn_inferior (); /* or just win32_mourn_inferior? */
2001 win32_prepare_to_store (struct regcache *regcache)
2003 /* Do nothing, since we can store individual regs */
2007 win32_can_run (void)
2015 DEBUG_EVENTS (("gdb: win32_close, inferior_ptid=%d\n",
2016 PIDGET (inferior_ptid)));
2019 /* Convert pid to printable format. */
2021 win32_pid_to_str (ptid_t ptid)
2023 static char buf[80];
2025 if (ptid_get_tid (ptid) != 0)
2027 snprintf (buf, sizeof (buf), "Thread %d.0x%lx",
2028 ptid_get_pid (ptid), ptid_get_tid (ptid));
2032 return normal_pid_to_str (ptid);
2036 win32_xfer_shared_libraries (struct target_ops *ops,
2037 enum target_object object, const char *annex,
2038 gdb_byte *readbuf, const gdb_byte *writebuf,
2039 ULONGEST offset, LONGEST len)
2041 struct obstack obstack;
2049 obstack_init (&obstack);
2050 obstack_grow_str (&obstack, "<library-list>\n");
2051 for (so = solib_start.next; so; so = so->next)
2052 win32_xfer_shared_library (so->so_name, (CORE_ADDR) so->lm_info->load_addr,
2054 obstack_grow_str0 (&obstack, "</library-list>\n");
2056 buf = obstack_finish (&obstack);
2057 len_avail = strlen (buf);
2058 if (offset >= len_avail)
2061 if (len > len_avail - offset)
2062 len = len_avail - offset;
2063 memcpy (readbuf, buf + offset, len);
2065 obstack_free (&obstack, NULL);
2070 win32_xfer_partial (struct target_ops *ops, enum target_object object,
2071 const char *annex, gdb_byte *readbuf,
2072 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
2076 case TARGET_OBJECT_MEMORY:
2078 return (*ops->deprecated_xfer_memory) (offset, readbuf,
2079 len, 0/*read*/, NULL, ops);
2081 return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf,
2082 len, 1/*write*/, NULL, ops);
2085 case TARGET_OBJECT_LIBRARIES:
2086 return win32_xfer_shared_libraries (ops, object, annex, readbuf,
2087 writebuf, offset, len);
2090 if (ops->beneath != NULL)
2091 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
2092 readbuf, writebuf, offset, len);
2098 init_win32_ops (void)
2100 win32_ops.to_shortname = "child";
2101 win32_ops.to_longname = "Win32 child process";
2102 win32_ops.to_doc = "Win32 child process (started by the \"run\" command).";
2103 win32_ops.to_open = win32_open;
2104 win32_ops.to_close = win32_close;
2105 win32_ops.to_attach = win32_attach;
2106 win32_ops.to_attach_no_wait = 1;
2107 win32_ops.to_detach = win32_detach;
2108 win32_ops.to_resume = win32_resume;
2109 win32_ops.to_wait = win32_wait;
2110 win32_ops.to_fetch_registers = win32_fetch_inferior_registers;
2111 win32_ops.to_store_registers = win32_store_inferior_registers;
2112 win32_ops.to_prepare_to_store = win32_prepare_to_store;
2113 win32_ops.deprecated_xfer_memory = win32_xfer_memory;
2114 win32_ops.to_xfer_partial = win32_xfer_partial;
2115 win32_ops.to_files_info = win32_files_info;
2116 win32_ops.to_insert_breakpoint = memory_insert_breakpoint;
2117 win32_ops.to_remove_breakpoint = memory_remove_breakpoint;
2118 win32_ops.to_terminal_init = terminal_init_inferior;
2119 win32_ops.to_terminal_inferior = terminal_inferior;
2120 win32_ops.to_terminal_ours_for_output = terminal_ours_for_output;
2121 win32_ops.to_terminal_ours = terminal_ours;
2122 win32_ops.to_terminal_save_ours = terminal_save_ours;
2123 win32_ops.to_terminal_info = child_terminal_info;
2124 win32_ops.to_kill = win32_kill_inferior;
2125 win32_ops.to_create_inferior = win32_create_inferior;
2126 win32_ops.to_mourn_inferior = win32_mourn_inferior;
2127 win32_ops.to_can_run = win32_can_run;
2128 win32_ops.to_thread_alive = win32_win32_thread_alive;
2129 win32_ops.to_pid_to_str = win32_pid_to_str;
2130 win32_ops.to_stop = win32_stop;
2131 win32_ops.to_stratum = process_stratum;
2132 win32_ops.to_has_all_memory = 1;
2133 win32_ops.to_has_memory = 1;
2134 win32_ops.to_has_stack = 1;
2135 win32_ops.to_has_registers = 1;
2136 win32_ops.to_has_execution = 1;
2137 win32_ops.to_pid_to_exec_file = win32_pid_to_exec_file;
2138 win32_ops.to_magic = OPS_MAGIC;
2142 set_win32_aliases (char *argv0)
2144 add_info_alias ("dll", "sharedlibrary", 1);
2148 _initialize_win32_nat (void)
2150 struct cmd_list_element *c;
2154 c = add_com ("dll-symbols", class_files, dll_symbol_command,
2155 _("Load dll library symbols from FILE."));
2156 set_cmd_completer (c, filename_completer);
2158 add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1);
2161 add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\
2162 Set use of shell to start subprocess."), _("\
2163 Show use of shell to start subprocess."), NULL,
2165 NULL, /* FIXME: i18n: */
2166 &setlist, &showlist);
2168 add_setshow_boolean_cmd ("cygwin-exceptions", class_support, &cygwin_exceptions, _("\
2169 Break when an exception is detected in the Cygwin DLL itself."), _("\
2170 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL,
2172 NULL, /* FIXME: i18n: */
2173 &setlist, &showlist);
2176 add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\
2177 Set creation of new console when creating child process."), _("\
2178 Show creation of new console when creating child process."), NULL,
2180 NULL, /* FIXME: i18n: */
2181 &setlist, &showlist);
2183 add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\
2184 Set creation of new group when creating child process."), _("\
2185 Show creation of new group when creating child process."), NULL,
2187 NULL, /* FIXME: i18n: */
2188 &setlist, &showlist);
2190 add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\
2191 Set whether to display execution in child process."), _("\
2192 Show whether to display execution in child process."), NULL,
2194 NULL, /* FIXME: i18n: */
2195 &setlist, &showlist);
2197 add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\
2198 Set whether to display kernel events in child process."), _("\
2199 Show whether to display kernel events in child process."), NULL,
2201 NULL, /* FIXME: i18n: */
2202 &setlist, &showlist);
2204 add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\
2205 Set whether to display memory accesses in child process."), _("\
2206 Show whether to display memory accesses in child process."), NULL,
2208 NULL, /* FIXME: i18n: */
2209 &setlist, &showlist);
2211 add_setshow_boolean_cmd ("debugexceptions", class_support,
2212 &debug_exceptions, _("\
2213 Set whether to display kernel exceptions in child process."), _("\
2214 Show whether to display kernel exceptions in child process."), NULL,
2216 NULL, /* FIXME: i18n: */
2217 &setlist, &showlist);
2219 add_prefix_cmd ("w32", class_info, info_w32_command,
2220 _("Print information specific to Win32 debugging."),
2221 &info_w32_cmdlist, "info w32 ", 0, &infolist);
2223 add_cmd ("selector", class_info, display_selectors,
2224 _("Display selectors infos."),
2226 add_target (&win32_ops);
2227 deprecated_init_ui_hook = set_win32_aliases;
2230 /* Hardware watchpoint support, adapted from go32-nat.c code. */
2232 /* Pass the address ADDR to the inferior in the I'th debug register.
2233 Here we just store the address in dr array, the registers will be
2234 actually set up when win32_continue is called. */
2236 cygwin_set_dr (int i, CORE_ADDR addr)
2239 internal_error (__FILE__, __LINE__,
2240 _("Invalid register %d in cygwin_set_dr.\n"), i);
2241 dr[i] = (unsigned) addr;
2242 debug_registers_changed = 1;
2243 debug_registers_used = 1;
2246 /* Pass the value VAL to the inferior in the DR7 debug control
2247 register. Here we just store the address in D_REGS, the watchpoint
2248 will be actually set up in win32_wait. */
2250 cygwin_set_dr7 (unsigned val)
2253 debug_registers_changed = 1;
2254 debug_registers_used = 1;
2257 /* Get the value of the DR6 debug status register from the inferior.
2258 Here we just return the value stored in dr[6]
2259 by the last call to thread_rec for current_event.dwThreadId id. */
2261 cygwin_get_dr6 (void)
2266 /* Determine if the thread referenced by "ptid" is alive
2267 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
2268 it means that the thread has died. Otherwise it is assumed to be alive. */
2270 win32_win32_thread_alive (ptid_t ptid)
2274 gdb_assert (ptid_get_tid (ptid) != 0);
2275 tid = ptid_get_tid (ptid);
2277 return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) == WAIT_OBJECT_0 ?
2282 _initialize_check_for_gdb_ini (void)
2285 if (inhibit_gdbinit)
2288 homedir = getenv ("HOME");
2292 char *oldini = (char *) alloca (strlen (homedir) +
2293 sizeof ("/gdb.ini"));
2294 strcpy (oldini, homedir);
2295 p = strchr (oldini, '\0');
2296 if (p > oldini && p[-1] != '/')
2298 strcpy (p, "gdb.ini");
2299 if (access (oldini, 0) == 0)
2301 int len = strlen (oldini);
2302 char *newini = alloca (len + 1);
2303 sprintf (newini, "%.*s.gdbinit",
2304 (int) (len - (sizeof ("gdb.ini") - 1)), oldini);
2305 warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini);
2311 _initialize_psapi (void)
2313 /* Load optional functions used for retrieving filename information
2314 associated with the currently debugged process or its dlls. */
2317 HMODULE psapi_module_handle;
2321 psapi_module_handle = LoadLibrary ("psapi.dll");
2322 if (psapi_module_handle)
2324 psapi_EnumProcessModules = (void *) GetProcAddress (psapi_module_handle, "EnumProcessModules");
2325 psapi_GetModuleInformation = (void *) GetProcAddress (psapi_module_handle, "GetModuleInformation");
2326 psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle, "GetModuleFileNameExA");
2328 if (psapi_EnumProcessModules != NULL
2329 && psapi_GetModuleInformation != NULL
2330 && psapi_GetModuleFileNameExA != NULL)
2335 /* This will probably fail on Windows 9x/Me. Let the user know that we're
2336 missing some functionality. */
2337 if (psapi_loaded < 0)
2338 warning(_("cannot automatically find executable file or library to read symbols. Use \"file\" or \"dll\" command to load executable/libraries directly."));